Question: What Class IB flammable liquid has the highest time-weighted average exposure limit?
Paraphrase: What class IB flammable liquid has the largest time-weighted avg exposure limit?
SPARQL (Wikidata): select ?ent where { ?ent wdt:P31 wd:Q21009055 . ?ent wdt:P2404 ?obj } ORDER BY DESC(?obj)LIMIT 5 
Answer: dimethoxymethane, acetone, Octane, isopropyl ether, n-heptane